Hitch ball assembly



FIG. 1 is a top, front, left perspective view of a hitch ball assembly showing my new design;

FIG. 2 is a top, rear, left perspective view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a top view thereof;

FIG. 6 is a bottom view thereof; and

FIG. 7 is a front view thereof; and,

FIG. 8 is a rear view thereof.

The broken lines of FIGS. 1, 2, 3, 4, and 6 are included for the purpose of illustrating environment and form no part of the claimed design. 

The ornamental design for a hitch ball assembly, as shown and described. 